Is radon detectable by sight, smell, or taste?

Radon is a colorless, odorless, and tasteless gas, which makes it undetectable by any human sensory means. This characteristic is crucial in understanding the risks associated with this gas, as it can accumulate in indoor spaces without being noticed. The lack of color, smell, or taste emphasizes the importance of using specific measurement tools and techniques to detect radon levels in homes and other buildings. Consequently, awareness of radon's undetectable nature reinforces the need for regular testing, especially in areas where radon is known to be prevalent.

Despite the other options presenting alternative scenarios, they do not align with the scientific understanding of radon. Only specialized equipment can accurately measure its presence, affirming that radon cannot be perceived through the senses.